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/*
Read RR's in getdns wire format and print them in presentation
format.
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <getdns/getdns.h>
#include <getdns/getdns_extra.h>
#undef DEBUG
#if defined(DEBUG)
static void
hd(const char *buf, size_t buf_len)
{
for (size_t n = 0; n < buf_len; n++)
{
if (n % 16 == 0)
{
if (n != 0)
fprintf(stderr, "\n");
fprintf(stderr, "%08x ", n);
}
else if (n % 8 == 0)
fprintf(stderr, " ");
fprintf(stderr, "%02hhx ", buf[n]);
}
fprintf(stderr, "\n");
}
#else /* !DEBUG */
#define hd(a,b)
#endif
#define CHUNKSIZE 4096
static size_t
read_inbuf(FILE *infp, uint8_t **bufp_out)
{
size_t nread = 0;
uint8_t *wirebuf = malloc(CHUNKSIZE);
int chunks = 1;
if (wirebuf == NULL)
goto out;
while (1)
{
size_t n = fread(wirebuf + nread, 1, CHUNKSIZE, infp);
nread += n;
if (n < CHUNKSIZE)
break; /* Done. */
wirebuf = realloc(wirebuf, ++chunks * CHUNKSIZE);
if (wirebuf == NULL)
break;
}
out:
if (bufp_out != NULL)
*bufp_out = wirebuf;
return nread;
}
static getdns_return_t
wire_rrs2list(const uint8_t *buf, size_t buf_len, getdns_list **list_out)
{
getdns_return_t r = GETDNS_RETURN_GOOD;
getdns_list *list = getdns_list_create();
getdns_dict *dict = NULL;
size_t rr_count = 0;
if (list == NULL)
return GETDNS_RETURN_MEMORY_ERROR;
while (buf_len > 0)
{
r = getdns_wire2rr_dict_scan(&buf, &buf_len, &dict);
if (r)
break;
r = getdns_list_set_dict(list, rr_count, dict);
getdns_dict_destroy(dict); /* The list has a copy. */
if (r)
break;
rr_count++;
}
if (list_out)
*list_out = list;
return r;
}
int
main(int argc, char *argv[])
{
/* Read from file in argv[1] or from stdin. */
FILE *infp = stdin;
if (argc > 1)
{
infp = fopen(argv[1], "r");
if (infp == NULL)
{
perror("fopen(argv[1])");
return errno;
}
}
/* Read RRs in wire format. */
uint8_t *inbuf = NULL;
size_t inbuf_len = read_inbuf(infp, &inbuf);
if (inbuf == NULL)
{
perror("read_inbuf");
return errno;
}
if (infp != stdin)
if (fclose(infp))
perror("fclose");
hd((const char *) wirebuf, n); /* DEBUG */
/* Convert to getdns dicts in a getdns list. */
getdns_return_t r = 0;
getdns_list *rrs_list = NULL;
r = wire_rrs2list(inbuf, inbuf_len, &rrs_list);
free(inbuf);
if (r)
{
fprintf(stderr, "error converting input: %s\n",
getdns_get_errorstr_by_id(r));
getdns_list_destroy(rrs_list);
return r;
}
/* Print dicts in list. */
size_t rrs_list_len;
r = getdns_list_get_length(rrs_list, &rrs_list_len);
if (r)
{
fprintf(stderr, "error getting list length: %s\n",
getdns_get_errorstr_by_id(r));
return r;
}
for (size_t i = 0; i < rrs_list_len; i++)
{
char *stringbuf = NULL;
getdns_dict *rr_dict = NULL;
r = getdns_list_get_dict(rrs_list, i, &rr_dict);
if (r)
{
fprintf(stderr, "error getting dict from list: %s\n",
getdns_get_errorstr_by_id(r));
break;
}
r = getdns_rr_dict2str(rr_dict, &stringbuf);
if (r)
{
fprintf(stderr, "error converting dict to string: %s\n",
getdns_get_errorstr_by_id(r));
break;
}
printf("%s", stringbuf);
free(stringbuf);
}
getdns_list_destroy(rrs_list);
return r;
}
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